266 Field Museum of Natural History — Zoology, Vol. Vll. 



tips and without grinding surface; alimentary canal shorter than the 

 body; peritoneum pale; scales 42 to 48; first dorsal ray connected 

 to second by a membrane as in Pimephales, which in general appear- 

 ance it much resembles. 



Cliola vigilax (Baird & Girard). Bullhead Minnow; Flathead. 



Head, 3.7 to 4.1; depth 4.1 to 4.5; D. 9; A. 7; scales 39 to 44. 



Body rather robust; snout blunt; mouth small, subinferior, tip 

 of upper lip on level with inferior margin of orbit; maxillary not 

 reaching orbit, its length 2.9 to 3.6 in head; snout 2.9 to ^.^ ; diameter 

 of eye 3.2 to 4.0; teeth 4-4 with grinding surface and slight hooks; 

 alimentary canal about equal to length of body; peritoneum pale; 



Fig. 31. Bullhead Minnow; Flathead. 



Cliola vigilax (Baird and Girard). (From Forbes and Richardson.) 



lateral line complete; scales smaller on anterior half of body, 21 to 

 27 rows in a series before dorsal fin. 



Length 2 or 3 inches. 



Color dusky olive or yellowish above; sides silvery, with a faint 

 suggestion of a dark lateral band; a small jet-black caudal spot, and 

 a prominent black spot on the anterior 3 or 4 rays of the dorsal fin; 

 spring males with head leaden to blackish, and entire body more or 

 less dusky. 



This fish inhabits clear water, ranging from Iowa to Ohio, Georgia, 

 and Texas. 



Genus Notropis Rafinesque. 



Silvery Minnows. 



Body more or less elongate, not much compressed; mouth ter- 

 minal oblique to nearly horizontal and inferior; premaxillaries pro- 

 tractile; no barbels; teeth in one or two rows, the main row always 

 4-4 ; alimentary canal about the length of the body, peritoneum pale 



